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Newest topics and users posts
27 Nov-16:11:43 Re: collection of sante celiberti (Sante Celiberti)
27 Nov-14:09:51 Re: presentation of new members - reference thread (Philippe Durand)
27 Nov-13:32:49 Mineral talks live - episode 22 - katherine dunnell; earth sci tech, royal ontario museum (Bluecapproductions)
27 Nov-12:38:14 Re: collection of firmo espinar (Firmo Espinar)
27 Nov-11:36:57 Re: presentation of new members - reference thread (Don Lum)
27 Nov-09:20:07 Re: collection of volkmar stingl (Volkmar Stingl)
27 Nov-04:03:46 Presentation of new members - alain abreal from france, passionate about minerals (Alain.Abreal)
26 Nov-23:39:28 Re: cylindrical calcite crystal? (Shravigunjal)
26 Nov-18:12:10 Popular minerals - ludlamite from amazonas, brazil (Jordi Fabre)
26 Nov-14:21:31 Re: collection of annemieke en rob schnerr (Sante Celiberti)
26 Nov-11:09:25 Re: collection of michael shaw (Michael Shaw)
26 Nov-07:44:06 Re: collection of annemieke en rob schnerr (Rob Schnerr)
26 Nov-07:37:17 Re: collection of annemieke en rob schnerr (Tobi)
26 Nov-06:29:23 Re: collection of volkmar stingl (Volkmar Stingl)
26 Nov-05:40:04 Re: collection of annemieke en rob schnerr (Sante Celiberti)
26 Nov-05:31:05 Re: collection of michael shaw (Tobi)
26 Nov-05:26:59 Re: collection of annemieke en rob schnerr (Tobi)
25 Nov-15:37:55 Re: odd textures on this large beryl (Russepp)
25 Nov-15:20:35 Re: collecting and imagining (Sante Celiberti)
25 Nov-14:52:07 Re: odd textures on this large beryl (Sante Celiberti)
25 Nov-11:10:04 Re: collection of volkmar stingl (Volkmar Stingl)
25 Nov-09:59:00 Re: odd textures on this large beryl (Russepp)
25 Nov-07:43:45 Re: collection of annemieke en rob schnerr (Rob Schnerr)
25 Nov-05:17:02 Re: odd textures on this large beryl (Fiebre Verde)
24 Nov-14:53:52 Re: odd textures on this large beryl (John S. White)

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  Topic: Vauxite from Huanuni?
al mar

Replies: 3
Views: 440

PostForum: Mines and Mineral Localities   Posted: Nov 08, 2020 02:37   Subject: Re: Vauxite from Huanuni?
Here I have one photo of those vauxites if it helps.
  Topic: Vauxite from Huanuni?
al mar

Replies: 3
Views: 440

PostForum: Mines and Mineral Localities   Posted: Nov 06, 2020 06:44   Subject: Vauxite from Huanuni?
Hello,

On my last trip to Bolivia, in 2016 I got one sample of vauxite that supposedly came from the Huanuni mine. I got that sample from a mining engineer that works in the mine, and taking minera ...
  Topic: Sodium Dithonite, Waller solution, Oxalic acid or HCl
al mar

Replies: 9
Views: 2160

PostForum: Conserving, Preparing and Cleaning Minerals   Posted: Jul 26, 2020 12:34   Subject: Re: Sodium Dithonite, Waller solution, Oxalic acid or HCl
Hello, to all,


Thanks for the guidelines! I started with the cleaning and preparation, we will see the results.

A last question. What andvantages/disadvantages has the Waller solution (Sodium ...
  Topic: Sodium Dithonite, Waller solution, Oxalic acid or HCl
al mar

Replies: 9
Views: 2160

PostForum: Conserving, Preparing and Cleaning Minerals   Posted: Jul 21, 2020 16:43   Subject: Re: Sodium Dithonite, Waller solution, Oxalic acid or HCl
Hi,

Thanks to all. First yes, managing chemical products even these that are commonly used has to be done with the proper security measures that are available on the internet and on the safety form ...
  Topic: Sodium Dithonite, Waller solution, Oxalic acid or HCl
al mar

Replies: 9
Views: 2160

PostForum: Conserving, Preparing and Cleaning Minerals   Posted: Jul 21, 2020 04:35   Subject: Sodium Dithonite, Waller solution, Oxalic acid or HCl
Hello,

I have some samples of quartz and feldspar with a coating of iron oxides.

Being quite resistant minerals, I am only used to clean them with HCl (muriatic acid), but I have read that it i ...
  Topic: Natural Blue Topaz w/ Multiple Tiny Unknown Mineral Inclusions
al mar

Replies: 4
Views: 1328

PostForum: What is it? - Where is it from?   Posted: May 16, 2020 10:34   Subject: Re: Natural Blue Topaz w/ Multiple Tiny Unknown Mineral Inclusions
I have seen elbaites directly associated with galena from brazil, and not glued for sure. Totally strange, but possible
  Topic: Colours of Rhodochrosite and Other Mn Bearing Carbonates
al mar

Replies: 9
Views: 6924

PostForum: Minerals and Mineralogy   Posted: Jul 25, 2019 08:44   Subject: Re: Colours of Rhodochrosite and Other Mn Bearing Carbonates
Thanks Alfredo. The one that I saw from Huanuni could be rhodocrosite but also could be an Mn bearing Carbonate. Regarding ones from Llallagua the aspect was the one that you describe so it would be p ...
  Topic: Colours of Rhodochrosite and Other Mn Bearing Carbonates
al mar

Replies: 9
Views: 6924

PostForum: Minerals and Mineralogy   Posted: Jul 23, 2019 14:07   Subject: Re: Colours of Rhodochrosite and Other Mn Bearing Carbonates
Regarding to Bolivian ones, in Mindat there is one photo from San José, and I have seen botryoidal ones from Llallagua and one from Huanuni. All of them were pale pink, different to siderites from the ...
  Topic: Colours of Rhodochrosite and Other Mn Bearing Carbonates
al mar

Replies: 9
Views: 6924

PostForum: Minerals and Mineralogy   Posted: Jul 22, 2019 17:39   Subject: Re: Colours of Rhodochrosite and Other Mn Bearing Carbonates
Hi, to all, and thanks for the answers.

I found interesting the article that Pete quotes, and seems logical looking for example the capillitite variety,( https://www.mindat.org/min-27208.html ) imp ...
  Topic: Colours of Rhodochrosite and Other Mn Bearing Carbonates
al mar

Replies: 9
Views: 6924

PostForum: Minerals and Mineralogy   Posted: Jul 22, 2019 08:00   Subject: Colours of Rhodochrosite and Other Mn Bearing Carbonates
Hello,

I have seen that rhodocrosites from some deposits, as the ones from Huelva province in Spain, or the El-Valle Boinás ones ( https://www.mindat.org/gallery.php?loc=106025&min=3406) had a ...
  Topic: How to "Defrost" crystals in quartz
al mar

Replies: 4
Views: 5528

PostForum: Conserving, Preparing and Cleaning Minerals   Posted: Aug 26, 2018 09:45   Subject: Re: How to "Defrost" crystals in quartz
I have seem other samples in mineralogical shows (but it is difficult to find photos available to post) I know that some world top laboratories are working on that, but I find difficult to know thei ...
  Topic: How to "Defrost" crystals in quartz
al mar

Replies: 4
Views: 5528

PostForum: Conserving, Preparing and Cleaning Minerals   Posted: Aug 26, 2018 08:25   Subject: How to "Defrost" crystals in quartz
Hello, I have seen some crystals "defrost" from the quartz matrix covering, and the appearance is in most cases very good. I would like to know about experiences and methods used successfull ...
  Topic: Help me with price
al mar

Replies: 3
Views: 4896

PostForum: Off-Topic and Introductions   Posted: Jun 30, 2012 08:47   Subject: Re: Help me with price
This forum don´t allow questions about mineral trade. You can find a lot of similar crocoites at sale on shows or other websites, you should compare prices.
  Topic: Mineral specimens with inclusions - (28)
al mar

Replies: 92
Views: 160623

PostForum: Featured Columns of FMF   Posted: Sep 03, 2011 05:45   Subject: Re: Mineral specimens with inclusions
Elise, I have seen some very similar blue quartz specimens from Brazil .
  Topic: New Virtual Museum
al mar

Replies: 12
Views: 17946

PostForum: Worlwide Museums & Visits to Museums and private collections   Posted: Jul 22, 2011 15:11   Subject: Re: New Virtual Museum
Other mistake is a pink "dravite" from California...I suppose that is an elbaite.
  Topic: Inclusions of spiral or helical growth and screw dislocations - (0)
al mar

Replies: 42
Views: 99916

PostForum: Featured Columns of FMF   Posted: May 23, 2011 08:24   Subject: Re: Inclusions of spiral or helical growth and screw dislocations - (0)
I have seen a few spiral inclusions and this type of inclusions reminds me "Liesang rings"

Can be any scientific reason or only is apearance ?
  Topic: Unusual Hematite form?
al mar

Replies: 5
Views: 6913

PostForum: Minerals and Mineralogy   Posted: Feb 10, 2011 10:08   Subject: Re: Unusual Haematite form ?
An strange form!

I think must be an ancient stalactitic form , the stalactites leave the original matrix and were cemented on a massive iron ore .

However, there are so long.
  Topic: New blog about Hiendelaencina district.(in spanish)
al mar

Replies: 0
Views: 3604

PostForum: Off-Topic and Introductions   Posted: Feb 17, 2009 15:13   Subject: New blog about Hiendelaencina district.(in spanish)
Hello, I been created a new blog about Hiendelaencina district, but it is in Spanish language:
https://laverdaddelosartistas.blogspot.com
(link normalized by FMF)
 
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